Suspension and Chassis Questions about your suspension? Need chassis advice?

Ground Control Suspension

Thread Tools
 
Search this Thread
 
Old Aug 10, 2018 | 11:38 AM
  #1  
cwad8505's Avatar
Thread Starter
Junior Member
10 Year Member
 
Joined: Aug 2013
Posts: 79
Likes: 2
Ground Control Suspension

I recently watched the video by LSXMatt where he bought the rear portion of the ground control weight jack set up from another member who only needed the fronts. I spoke to ground control and they absolutely refuse to sell only the front or rears. I already have a coilover set up on the front and want to get the rear weight jacks. Would anyone have any interest in buying the fronts if I bought the kit?
Thanks,
Chris
Reply
Old Aug 11, 2018 | 02:06 PM
  #2  
FAST LiFE's Avatar
Member
25 Year Member
iTrader: (3)
 
Joined: Jan 2001
Posts: 221
Likes: 11
From: SF, CA
Re: Ground Control Suspension

If you don't have to absolutely have Ground Control rear weight jacks, you could use Allstar Performance spring spacer for the rear:

https://pitstopusa.com/i-5066715-all...uster-nut.html

and just get the right spring for them:

https://pitstopusa.com/c-131813-chas...cle-track.html
Reply
Old Aug 11, 2018 | 07:13 PM
  #3  
t/aws61985's Avatar
Senior Member
10 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Aug 2013
Posts: 621
Likes: 149
From: Chicago
Car: 85-6 TA 85 IROC 82-86 MSE 83 Pace
Engine: Slow ones
Transmission: Noisy ones
Axle/Gears: Weak ones
Re: Ground Control Suspension

http://umiperformance.com/catalog/in...ex&cPath=6_479

Umi makes them now as well.
Reply
Old Aug 11, 2018 | 09:10 PM
  #4  
Tibo's Avatar
Supreme Member
20 Year Member
iTrader: (15)
 
Joined: Jun 2003
Posts: 5,028
Likes: 78
From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Re: Ground Control Suspension

Originally Posted by t/aws61985
Those are for the front. UMI does make them for the rear but they are much more expensive. Why? I dunno.
Reply
Old Aug 12, 2018 | 11:01 AM
  #5  
t/aws61985's Avatar
Senior Member
10 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Aug 2013
Posts: 621
Likes: 149
From: Chicago
Car: 85-6 TA 85 IROC 82-86 MSE 83 Pace
Engine: Slow ones
Transmission: Noisy ones
Axle/Gears: Weak ones
Re: Ground Control Suspension

Originally Posted by Tibo
Those are for the front. UMI does make them for the rear but they are much more expensive. Why? I dunno.
My bad.
Reply
Old Aug 13, 2018 | 01:38 PM
  #6  
cwad8505's Avatar
Thread Starter
Junior Member
10 Year Member
 
Joined: Aug 2013
Posts: 79
Likes: 2
Re: Ground Control Suspension

Thanks for the responses, guys! I may end up going with ground control and posting the fronts for sale. Not sure yet.
Reply
Old Aug 13, 2018 | 02:56 PM
  #7  
ShiftyCapone's Avatar
Supporter/Moderator
25 Year Member
iTrader: (7)
 
Joined: Feb 2001
Posts: 13,749
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Ground Control Suspension

Originally Posted by Tibo
Those are for the front. UMI does make them for the rear but they are much more expensive. Why? I dunno.

Do you have a part number? I don't see a kit for the rear. Unless your post was a typo.
Reply
Old Aug 13, 2018 | 03:01 PM
  #8  
Jorlain's Avatar
Senior Member
iTrader: (4)
 
Joined: Jun 2014
Posts: 667
Likes: 16
From: Brainerd, MN
Car: '84 Trans Am
Engine: 357 SBC
Transmission: 700R4
Axle/Gears: 10 Bolt 3.73, Torsen Diff
Re: Ground Control Suspension

All I'm seeing for the rear is coil overs, which are definitely more expensive.
Reply
Old Aug 13, 2018 | 03:24 PM
  #9  
kaos420's Avatar
Member
 
Joined: Aug 2008
Posts: 172
Likes: 16
Car: 88 gta
Engine: 5.8
Transmission: 700R4
Axle/Gears: 3.73 POSI
Re: Ground Control Suspension

UMI has not released there rear weight jacks yet
Reply
Old Aug 13, 2018 | 03:55 PM
  #10  
ShiftyCapone's Avatar
Supporter/Moderator
25 Year Member
iTrader: (7)
 
Joined: Feb 2001
Posts: 13,749
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Ground Control Suspension

Originally Posted by kaos420
UMI has not released there rear weight jacks yet

Are they designing a set that you know of? If so that's exciting.
Reply
Old Aug 13, 2018 | 04:27 PM
  #11  
Tibo's Avatar
Supreme Member
20 Year Member
iTrader: (15)
 
Joined: Jun 2003
Posts: 5,028
Likes: 78
From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Re: Ground Control Suspension

Originally Posted by ShiftyCapone
Do you have a part number? I don't see a kit for the rear. Unless your post was a typo.
I was wrong.
Reply
Old Aug 13, 2018 | 06:27 PM
  #12  
obeymybird's Avatar
Supreme Member
20 Year Member
Liked
Loved
iTrader: (4)
 
Joined: Sep 2005
Posts: 1,125
Likes: 55
From: PA
Car: 92 camaro RS
Engine: LSA
Transmission: Magnum F
Axle/Gears: TNT 8.8 wavetrac 3.31
Re: Ground Control Suspension

Yes umi will have rear weight jacks out for sale anytime now and the adjuster will be on the top kind of like there front kit.
Reply
Old Aug 22, 2018 | 09:03 AM
  #13  
Beater79TA's Avatar
Senior Member
20 Year Member
 
Joined: Aug 2004
Posts: 991
Likes: 24
From: Peoria, AZ
Re: Ground Control Suspension

I saw the rear kit at the UMI Open House 2 weeks ago. It is close to becoming available with it currently being tested on their shop 4th gen at the track and the shop 3rd gen for fitment and less strenuous driving. No idea on what their pricing will be when they hit the market but probably similar to the front kit since the design is very similar. We might have a pre-release set on our GTA for testing at LSFest depending on timing and availability between now and then.
Reply
Old Aug 22, 2018 | 10:24 AM
  #14  
Tibo's Avatar
Supreme Member
20 Year Member
iTrader: (15)
 
Joined: Jun 2003
Posts: 5,028
Likes: 78
From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Re: Ground Control Suspension

Originally Posted by Beater79TA
I saw the rear kit at the UMI Open House 2 weeks ago. It is close to becoming available with it currently being tested on their shop 4th gen at the track and the shop 3rd gen for fitment and less strenuous driving. No idea on what their pricing will be when they hit the market but probably similar to the front kit since the design is very similar. We might have a pre-release set on our GTA for testing at LSFest depending on timing and availability between now and then.
To be clear, is the design like the front set of weight jacks UMI makes or the rear set that ground control makes?
Reply
Old Aug 22, 2018 | 10:32 AM
  #15  
Beater79TA's Avatar
Senior Member
20 Year Member
 
Joined: Aug 2004
Posts: 991
Likes: 24
From: Peoria, AZ
Re: Ground Control Suspension

Originally Posted by Tibo
To be clear, is the design like the front set of weight jacks UMI makes or the rear set that ground control makes?
Similar to the front set UMI makes with the adjust at the top using a threaded rod. Completely different from the rear design used by Ground Control which operates more like a coilover shock spring.
Reply
Old Aug 22, 2018 | 03:25 PM
  #16  
Abubaca's Avatar
Moderator
25 Year Member
Liked
Loved
iTrader: (3)
 
Joined: Feb 2001
Posts: 8,494
Likes: 411
From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
Re: Ground Control Suspension

Generally speaking, I'm a big fan of UMI, and have most of their 82-92 catalog under my car. That being said, I've had the Ground Control weight jacks for a few years now and have been really impressed. Easy adjustment, nice ride, and quality looking ano and powdercoat.

Reply
Old Aug 22, 2018 | 03:31 PM
  #17  
Beater79TA's Avatar
Senior Member
20 Year Member
 
Joined: Aug 2004
Posts: 991
Likes: 24
From: Peoria, AZ
Re: Ground Control Suspension

I can't really fault the Ground Control units and how well they survived 6 years of the beating we laid on them. But at that point they had to be replaced. We had beaten them to a pulp and the fronts had developed some scary bends to the upper spring plates. Most people will likely never punish their suspension the way we do though with thousands of track and autocross laps every year. I wouldn't hesitate to use Ground Control again on a cruiser or something that only saw the track a couple times a year though. To go back to them now on the track warriors would require a maintenance plan to replace them every few years with a new set with is difficult to do since GC won't sell fronts and rears separately.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mike22115
Aftermarket Product Review
8
Apr 29, 2017 02:19 PM
Zach/90\irocZ
Engine/Drivetrain/Suspension Parts for Sale
40
Apr 22, 2015 05:49 PM
tpidude1
Suspension and Chassis
6
Feb 26, 2010 11:42 AM
84 1LE
Aftermarket Product Review
4
Apr 6, 2006 07:07 PM
nape
NW Indiana and South Chicago Suburb
11
Feb 9, 2005 02:27 PM




All times are GMT -5. The time now is 01:08 PM.